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Cyrill Gorcunov [Sat, 8 May 2010 11:25:52 +0000 (15:25 +0400)]
x86, perf: P4 PMU -- protect sensible procedures from preemption
Steven reported:
|
| I'm getting:
|
| Pid: 3477, comm: perf Not tainted 2.6.34-rc6 #2727
| Call Trace:
| [<
ffffffff811c7565>] debug_smp_processor_id+0xd5/0xf0
| [<
ffffffff81019874>] p4_hw_config+0x2b/0x15c
| [<
ffffffff8107acbc>] ? trace_hardirqs_on_caller+0x12b/0x14f
| [<
ffffffff81019143>] hw_perf_event_init+0x468/0x7be
| [<
ffffffff810782fd>] ? debug_mutex_init+0x31/0x3c
| [<
ffffffff810c68b2>] T.850+0x273/0x42e
| [<
ffffffff810c6cab>] sys_perf_event_open+0x23e/0x3f1
| [<
ffffffff81009e6a>] ? sysret_check+0x2e/0x69
| [<
ffffffff81009e32>] system_call_fastpath+0x16/0x1b
|
| When running perf record in latest tip/perf/core
|
Due to the fact that p4 counters are shared between HT threads
we synthetically divide the whole set of counters into two
non-intersected subsets. And while we're "borrowing" counters
from these subsets we should not be preempted (well, strictly
speaking in p4_hw_config we just pre-set reference to the
subset which allow to save some cycles in schedule routine
if it happens on the same cpu). So use get_cpu/put_cpu pair.
Also p4_pmu_schedule_events should use smp_processor_id rather
than raw_ version. This allow us to catch up preemption issue
(if there will ever be).
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Lin Ming <ming.m.lin@intel.com>
LKML-Reference: <
20100508112716.
963478928@openvz.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cyrill Gorcunov [Sat, 8 May 2010 11:39:52 +0000 (15:39 +0400)]
x86, perf: P4 PMU -- configure predefined events
If an event is not RAW we should not exit p4_hw_config
early but call x86_setup_perfctr as well.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Lin Ming <ming.m.lin@intel.com>
Cc: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Paul Mackerras [Sat, 8 May 2010 10:58:00 +0000 (20:58 +1000)]
perf_event: Make software events work again
Commit
6bde9b6ce0127e2a56228a2071536d422be31336 ("perf: Add
group scheduling transactional APIs") added code to allow a
group to be scheduled in a single transaction. However, it
introduced a bug in handling events whose pmu does not implement
transactions -- at the end of scheduling in the events in the
group, in the non-transactional case the code now falls through
to the group_error label, and proceeds to unschedule all the
events in the group and return failure.
This fixes it by returning 0 (success) in the non-transactional
case.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Lin Ming <ming.m.lin@intel.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: eranian@gmail.com
LKML-Reference: <
20100508105800.GB10650@brick.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Sat, 8 May 2010 08:02:57 +0000 (10:02 +0200)]
Merge branch 'perf' of git://git./linux/kernel/git/acme/linux-2.6 into perf/core
Arnaldo Carvalho de Melo [Fri, 7 May 2010 17:07:05 +0000 (14:07 -0300)]
perf list: Improve the raw hw event descriptor documentation
It was x86 specific and imcomplete at that, improve the situation by
making it clear where the example provided applies and by adding the
URLs for the Intel and AMD manuals where this is discussed in depth.
Acked-by: Robert Richter <robert.richter@amd.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Robert Richter <robert.richter@amd.com>
Reported-by: Robert Richter <robert.richter@amd.com
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Lin Ming [Fri, 23 Apr 2010 05:56:12 +0000 (13:56 +0800)]
perf, x86: implement group scheduling transactional APIs
Convert to the transactional PMU API and remove the duplication of
group_sched_in().
Reviewed-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: David Miller <davem@davemloft.net>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <
1272002172.5707.61.camel@minggr.sh.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Lin Ming [Fri, 23 Apr 2010 05:56:00 +0000 (13:56 +0800)]
perf: Add group scheduling transactional APIs
Add group scheduling transactional APIs to struct pmu.
These APIs will be implemented in arch code, based on Peter's idea as
below.
> the idea behind hw_perf_group_sched_in() is to not perform
> schedulability tests on each event in the group, but to add the group
> as a whole and then perform one test.
>
> Of course, when that test fails, you'll have to roll-back the whole
> group again.
>
> So start_txn (or a better name) would simply toggle a flag in the pmu
> implementation that will make pmu::enable() not perform the
> schedulablilty test.
>
> Then commit_txn() will perform the schedulability test (so note the
> method has to have a !void return value.
>
> This will allow us to use the regular
> kernel/perf_event.c::group_sched_in() and all the rollback code.
> Currently each hw_perf_group_sched_in() implementation duplicates all
> the rolllback code (with various bugs).
->start_txn:
Start group events scheduling transaction, set a flag to make
pmu::enable() not perform the schedulability test, it will be performed
at commit time.
->commit_txn:
Commit group events scheduling transaction, perform the group
schedulability as a whole
->cancel_txn:
Stop group events scheduling transaction, clear the flag so
pmu::enable() will perform the schedulability test.
Reviewed-by: Stephane Eranian <eranian@google.com>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Cc: David Miller <davem@davemloft.net>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <
1272002160.5707.60.camel@minggr.sh.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Thu, 8 Apr 2010 21:03:20 +0000 (23:03 +0200)]
perf, x86: Improve the PEBS ABI
Rename perf_event_attr::precise to perf_event_attr::precise_ip and
widen it to 2 bits. This new field describes the required precision of
the PERF_SAMPLE_IP field:
0 - SAMPLE_IP can have arbitrary skid
1 - SAMPLE_IP must have constant skid
2 - SAMPLE_IP requested to have 0 skid
3 - SAMPLE_IP must have 0 skid
And modify the Intel PEBS code accordingly. The PEBS implementation
now supports up to precise_ip == 2, where we perform the IP fixup.
Also s/PERF_RECORD_MISC_EXACT/&_IP/ to clarify its meaning, this bit
should be set for each PERF_SAMPLE_IP field known to match the actual
instruction triggering the event.
This new scheme allows for a PEBS mode that uses the buffer for more
than a single event.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Thu, 8 Apr 2010 21:03:20 +0000 (23:03 +0200)]
perf, x86: Consolidate some code repetition
Remove some duplicated logic.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Tue, 4 May 2010 14:30:21 +0000 (16:30 +0200)]
perf, x86: Remove PEBS SAMPLE_RAW support
Its broken, we really should get PERF_SAMPLE_REGS sorted.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Robert Richter [Tue, 13 Apr 2010 20:23:15 +0000 (22:23 +0200)]
perf, x86: Use weight instead of cmask in for_each_event_constraint()
There may exist constraints with a cmask set to zero. In this case
for_each_event_constraint() will not work properly. Now weight is used
instead of the cmask for loop exit detection. Weight is always a value
other than zero since the default contains the HWEIGHT from the
counter mask and in other cases a value of zero does not fit too.
This is in preparation of ibs event constraints that wont have a
cmask.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <
1271190201-25705-7-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Robert Richter [Tue, 13 Apr 2010 20:23:14 +0000 (22:23 +0200)]
perf, x86: Pass enable bit mask to __x86_pmu_enable_event()
To reuse this function for events with different enable bit masks,
this mask is part of the function's argument list now.
The function will be used later to control ibs events too.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <
1271190201-25705-6-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Robert Richter [Tue, 13 Apr 2010 20:23:12 +0000 (22:23 +0200)]
perf, x86: Call x86_setup_perfctr() from .hw_config()
The perfctr setup calls are in the corresponding .hw_config()
functions now. This makes it possible to introduce config functions
for other pmu events that are not perfctr specific.
Also, all of a sudden the code looks much nicer.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <
1271190201-25705-4-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Robert Richter [Tue, 13 Apr 2010 20:23:11 +0000 (22:23 +0200)]
perf, x86: Move x86_setup_perfctr()
Move x86_setup_perfctr(), no other changes made.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <
1271190201-25705-3-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Robert Richter [Tue, 13 Apr 2010 20:23:10 +0000 (22:23 +0200)]
perf, x86: Move perfctr init code to x86_setup_perfctr()
Split __hw_perf_event_init() to configure pmu events other than
perfctrs. Perfctr code is moved to a separate function
x86_setup_perfctr(). This and the following patches refactor the code.
Split in multiple patches for better review.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <
1271190201-25705-2-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Thu, 6 May 2010 13:42:53 +0000 (15:42 +0200)]
perf: Annotate perf_event_read_group() vs perf_event_release_kernel()
Stephane reported a lockdep warning while using PERF_FORMAT_GROUP.
The issue is that perf_event_read_group() takes faults while holding
the ctx->mutex, while perf_event_release_kernel() can be called from
munmap(). Which makes for an AB-BA deadlock.
Except we can never establish the deadlock because we'll only ever
call perf_event_release_kernel() after all file descriptors are dead
so there is no concurrency possible.
Reported-by: Stephane Eranian <eranian@google.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Fri, 7 May 2010 09:30:29 +0000 (11:30 +0200)]
Merge branch 'perf/urgent' into perf/core
Merge reason: Resolve patch dependency
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Thu, 6 May 2010 15:31:38 +0000 (17:31 +0200)]
perf: Fix exit() vs PERF_FORMAT_GROUP
Both Stephane and Corey reported that PERF_FORMAT_GROUP didn't work
as expected if the task the counters were attached to quit before
the read() call.
The cause is that we unconditionally destroy the grouping when we
remove counters from their context. Fix this by only doing this when
we free the counter itself.
Reported-by: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Reported-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <
1273160566.5605.404.camel@twins>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Dan Carpenter [Sat, 20 Mar 2010 14:39:11 +0000 (17:39 +0300)]
perf: Fix check at end of event search
The original code doesn't work because "call" is never NULL there.
Signed-off-by: Dan Carpenter <error27@gmail.com>
LKML-Reference: <
20100320143911.GF5331@bicker>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Linus Torvalds [Wed, 5 May 2010 22:48:13 +0000 (15:48 -0700)]
Merge branch 'zerolen' of git://git./linux/kernel/git/jgarzik/misc-2.6
* 'zerolen' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/misc-2.6:
[MTD] Remove zero-length files mtdbdi.c and internal.ho
Linus Torvalds [Wed, 5 May 2010 22:47:57 +0000 (15:47 -0700)]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
pata_pcmcia / ide-cs: Fix bad hashes for Transcend and kingston IDs
libata: Fix several inaccuracies in developer's guide
Jeff Garzik [Wed, 5 May 2010 19:25:12 +0000 (15:25 -0400)]
[MTD] Remove zero-length files mtdbdi.c and internal.ho
Both were "removed" in commit
a33eb6b91034c95b9b08576f68be170f995b2c7d.
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Kristoffer Ericson [Sun, 2 May 2010 19:48:24 +0000 (21:48 +0200)]
pata_pcmcia / ide-cs: Fix bad hashes for Transcend and kingston IDs
This patch fixes the bad hashes for one Kingston and one Transcend card.
Thanks to komuro for pointing this out.
Signed-off-by: Kristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Sergei Shtylyov [Wed, 5 May 2010 13:27:10 +0000 (17:27 +0400)]
libata: Fix several inaccuracies in developer's guide
Commit
6bfff31e77cfa1b13490337e5a4dbaa3407e83ac (libata: kill probe_ent
and related helpers) killed ata_device_add() but didn't remove references
to it from the libata developer's guide.
Commits
9363c3825ea9ad76561eb48a395349dd29211ed6 (libata: rename SFF
functions) and
5682ed33aae05d10a25c95633ef9d9c062825888 (libata: rename
SFF port ops) renamed the taskfile access methods but didn't update the
developer's guide. Commit
c9f75b04ed5ed65a058d18a8a8dda50632a96de8
(libata: kill ata_noop_dev_select()) didn't update the developer's
guide as well.
The guide also refers to the long gone ata_pio_data_xfer_noirq(),
ata_pio_data_xfer(), and ata_mmio_data_xfer() -- replace those by
the modern ata_sff_data_xfer_noirq(), ata_sff_data_xfer(), and
ata_sff_data_xfer32().
Also, remove the reference to non-existant ata_port_stop()...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Linus Torvalds [Wed, 5 May 2010 18:18:16 +0000 (11:18 -0700)]
Merge branch 'slab-for-linus' of git://git./linux/kernel/git/penberg/slab-2.6
* 'slab-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
slub: Fix bad boundary check in init_kmem_cache_nodes()
Zhang, Yanmin [Thu, 1 Apr 2010 09:32:30 +0000 (17:32 +0800)]
slub: Fix bad boundary check in init_kmem_cache_nodes()
Function init_kmem_cache_nodes is incorrect when checking upper limitation of
kmalloc_caches. The breakage was introduced by commit
91efd773c74bb26b5409c85ad755d536448e229c ("dma kmalloc handling fixes").
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Linus Torvalds [Wed, 5 May 2010 16:06:24 +0000 (09:06 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
KEYS: call_sbin_request_key() must write lock keyrings before modifying them
KEYS: Use RCU dereference wrappers in keyring key type code
KEYS: find_keyring_by_name() can gain access to a freed keyring
Linus Torvalds [Wed, 5 May 2010 14:56:36 +0000 (07:56 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/tj/wq
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
workqueue: flush_delayed_work: keep the original workqueue for re-queueing
Linus Torvalds [Wed, 5 May 2010 14:55:07 +0000 (07:55 -0700)]
Merge git://git./linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
FEC: Fix kernel panic in fec_set_mac_address.
ipv6: Fix default multicast hops setting.
net: ep93xx_eth stops receiving packets
drivers/net/phy: micrel phy driver
dm9601: fix phy/eeprom write routine
ppp_generic: handle non-linear skbs when passing them to pppd
ppp_generic: pull 2 bytes so that PPP_PROTO(skb) is valid
net: fix compile error due to double return type in SOCK_DEBUG
net/usb: initiate sync sequence in sierra_net.c driver
net/usb: remove default in Kconfig for sierra_net driver
r8169: Fix rtl8169_rx_interrupt()
e1000e: Fix oops caused by ASPM patch.
net/sb1250: register mdio bus in probe
sctp: Fix skb_over_panic resulting from multiple invalid parameter errors (CVE-2010-1173) (v4)
p54pci: fix bugs in p54p_check_tx_ring
Linus Torvalds [Wed, 5 May 2010 14:54:22 +0000 (07:54 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: hda: Fix 0 dB for Packard Bell models using Conexant CX20549 (Venice)
ALSA: hda - Add quirk for Dell Inspiron 19T using a Conexant CX20582
ALSA: take tu->qlock with irqs disabled
ALSA: hda: Use olpc-xo-1_5 quirk for Toshiba Satellite P500-PSPGSC-01800T
ALSA: hda: Use olpc-xo-1_5 quirk for Toshiba Satellite Pro T130-15F
ALSA: hda - fix array indexing while creating inputs for Cirrus codecs
ALSA: es968: fix wrong PnP dma index
Linus Torvalds [Wed, 5 May 2010 14:53:18 +0000 (07:53 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: joydev - allow binding to button-only devices
Input: elantech - ignore high bits in the position coordinates
Input: elantech - allow forcing Elantech protocol
Input: elantech - fix firmware version check
Input: ati_remote - add some missing devices from lirc_atiusb
Input: eeti_ts - cancel pending work when going to suspend
Input: Add support of Synaptics Clickpad device
Revert "Input: ALPS - add signature for HP Pavilion dm3 laptops"
Input: psmouse - ignore parity error for basic protocols
Dan Williams [Wed, 5 May 2010 03:41:56 +0000 (20:41 -0700)]
raid6: fix recovery performance regression
The raid6 recovery code should immediately drop back to the optimized
synchronous path when a p+q dma resource is not available. Otherwise we
run the non-optimized/multi-pass async code in sync mode.
Verified with raid6test (NDISKS=255)
Applies to kernels >= 2.6.32.
Cc: <stable@kernel.org>
Acked-by: NeilBrown <neilb@suse.de>
Reported-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Arnaldo Carvalho de Melo [Wed, 5 May 2010 14:23:27 +0000 (11:23 -0300)]
perf tools: Fixup minor doc formatting issues
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Wed, 5 May 2010 14:20:05 +0000 (11:20 -0300)]
perf list: Add explanation about raw hardware event descriptors
Using explanation given by Ingo Molnar in the oprofile mailing list.
Suggested-by: Nick Black <dank@qemfd.net>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Nick Black <dank@qemfd.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tom Zanussi [Wed, 5 May 2010 03:20:16 +0000 (22:20 -0500)]
perf/record: simplify TRACE_INFO tracepoint check
Fix a couple of inefficiencies and redundancies related to
have_tracepoints() and its use when checking whether to write
TRACE_INFO.
First, there's no need to use get_tracepoints_path() in
have_tracepoints() - we really just want the part that checks whether
any attributes correspondo to tracepoints.
Second, we really don't care about raw_samples per se - tracepoints
are always raw_samples. In any case, the have_tracepoints() check
should be sufficient to decide whether or not to write TRACE_INFO.
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>,
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <
1273030770.6383.6.camel@tropicana>
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
David Howells [Fri, 30 Apr 2010 13:32:23 +0000 (14:32 +0100)]
KEYS: call_sbin_request_key() must write lock keyrings before modifying them
call_sbin_request_key() creates a keyring and then attempts to insert a link to
the authorisation key into that keyring, but does so without holding a write
lock on the keyring semaphore.
It will normally get away with this because it hasn't told anyone that the
keyring exists yet. The new keyring, however, has had its serial number
published, which means it can be accessed directly by that handle.
This was found by a previous patch that adds RCU lockdep checks to the code
that reads the keyring payload pointer, which includes a check that the keyring
semaphore is actually locked.
Without this patch, the following command:
keyctl request2 user b a @s
will provoke the following lockdep warning is displayed in dmesg:
===================================================
[ INFO: suspicious rcu_dereference_check() usage. ]
---------------------------------------------------
security/keys/keyring.c:727 invoked rcu_dereference_check() without protection!
other info that might help us debug this:
rcu_scheduler_active = 1, debug_locks = 0
2 locks held by keyctl/2076:
#0: (key_types_sem){.+.+.+}, at: [<
ffffffff811a5b29>] key_type_lookup+0x1c/0x71
#1: (keyring_serialise_link_sem){+.+.+.}, at: [<
ffffffff811a6d1e>] __key_link+0x4d/0x3c5
stack backtrace:
Pid: 2076, comm: keyctl Not tainted 2.6.34-rc6-cachefs #54
Call Trace:
[<
ffffffff81051fdc>] lockdep_rcu_dereference+0xaa/0xb2
[<
ffffffff811a6d1e>] ? __key_link+0x4d/0x3c5
[<
ffffffff811a6e6f>] __key_link+0x19e/0x3c5
[<
ffffffff811a5952>] ? __key_instantiate_and_link+0xb1/0xdc
[<
ffffffff811a59bf>] ? key_instantiate_and_link+0x42/0x5f
[<
ffffffff811aa0dc>] call_sbin_request_key+0xe7/0x33b
[<
ffffffff8139376a>] ? mutex_unlock+0x9/0xb
[<
ffffffff811a5952>] ? __key_instantiate_and_link+0xb1/0xdc
[<
ffffffff811a59bf>] ? key_instantiate_and_link+0x42/0x5f
[<
ffffffff811aa6fa>] ? request_key_auth_new+0x1c2/0x23c
[<
ffffffff810aaf15>] ? cache_alloc_debugcheck_after+0x108/0x173
[<
ffffffff811a9d00>] ? request_key_and_link+0x146/0x300
[<
ffffffff810ac568>] ? kmem_cache_alloc+0xe1/0x118
[<
ffffffff811a9e45>] request_key_and_link+0x28b/0x300
[<
ffffffff811a89ac>] sys_request_key+0xf7/0x14a
[<
ffffffff81052c0b>] ? trace_hardirqs_on_caller+0x10c/0x130
[<
ffffffff81394fb9>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[<
ffffffff81001eeb>] system_call_fastpath+0x16/0x1b
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
David Howells [Fri, 30 Apr 2010 13:32:18 +0000 (14:32 +0100)]
KEYS: Use RCU dereference wrappers in keyring key type code
The keyring key type code should use RCU dereference wrappers, even when it
holds the keyring's key semaphore.
Reported-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Toshiyuki Okajima [Fri, 30 Apr 2010 13:32:13 +0000 (14:32 +0100)]
KEYS: find_keyring_by_name() can gain access to a freed keyring
find_keyring_by_name() can gain access to a keyring that has had its reference
count reduced to zero, and is thus ready to be freed. This then allows the
dead keyring to be brought back into use whilst it is being destroyed.
The following timeline illustrates the process:
|(cleaner) (user)
|
| free_user(user) sys_keyctl()
| | |
| key_put(user->session_keyring) keyctl_get_keyring_ID()
| || //=> keyring->usage = 0 |
| |schedule_work(&key_cleanup_task) lookup_user_key()
| || |
| kmem_cache_free(,user) |
| . |[KEY_SPEC_USER_KEYRING]
| . install_user_keyrings()
| . ||
| key_cleanup() [<= worker_thread()] ||
| | ||
| [spin_lock(&key_serial_lock)] |[mutex_lock(&key_user_keyr..mutex)]
| | ||
| atomic_read() == 0 ||
| |{ rb_ease(&key->serial_node,) } ||
| | ||
| [spin_unlock(&key_serial_lock)] |find_keyring_by_name()
| | |||
| keyring_destroy(keyring) ||[read_lock(&keyring_name_lock)]
| || |||
| |[write_lock(&keyring_name_lock)] ||atomic_inc(&keyring->usage)
| |. ||| *** GET freeing keyring ***
| |. ||[read_unlock(&keyring_name_lock)]
| || ||
| |list_del() |[mutex_unlock(&key_user_k..mutex)]
| || |
| |[write_unlock(&keyring_name_lock)] ** INVALID keyring is returned **
| | .
| kmem_cache_free(,keyring) .
| .
| atomic_dec(&keyring->usage)
v *** DESTROYED ***
TIME
If CONFIG_SLUB_DEBUG=y then we may see the following message generated:
=============================================================================
BUG key_jar: Poison overwritten
-----------------------------------------------------------------------------
INFO: 0xffff880197a7e200-0xffff880197a7e200. First byte 0x6a instead of 0x6b
INFO: Allocated in key_alloc+0x10b/0x35f age=25 cpu=1 pid=5086
INFO: Freed in key_cleanup+0xd0/0xd5 age=12 cpu=1 pid=10
INFO: Slab 0xffffea000592cb90 objects=16 used=2 fp=0xffff880197a7e200 flags=0x200000000000c3
INFO: Object 0xffff880197a7e200 @offset=512 fp=0xffff880197a7e300
Bytes b4 0xffff880197a7e1f0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZZZZZ
Object 0xffff880197a7e200: 6a 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b jkkkkkkkkkkkkkkk
Alternatively, we may see a system panic happen, such as:
BUG: unable to handle kernel NULL pointer dereference at
0000000000000001
IP: [<
ffffffff810e61a3>] kmem_cache_alloc+0x5b/0xe9
PGD
6b2b4067 PUD
6a80d067 PMD 0
Oops: 0000 [#1] SMP
last sysfs file: /sys/kernel/kexec_crash_loaded
CPU 1
...
Pid: 31245, comm: su Not tainted 2.6.34-rc5-nofixed-nodebug #2 D2089/PRIMERGY
RIP: 0010:[<
ffffffff810e61a3>] [<
ffffffff810e61a3>] kmem_cache_alloc+0x5b/0xe9
RSP: 0018:
ffff88006af3bd98 EFLAGS:
00010002
RAX:
0000000000000000 RBX:
0000000000000001 RCX:
ffff88007d19900b
RDX:
0000000100000000 RSI:
00000000000080d0 RDI:
ffffffff81828430
RBP:
ffffffff81828430 R08:
ffff88000a293750 R09:
0000000000000000
R10:
0000000000000001 R11:
0000000000100000 R12:
00000000000080d0
R13:
00000000000080d0 R14:
0000000000000296 R15:
ffffffff810f20ce
FS:
00007f97116bc700(0000) GS:
ffff88000a280000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
CR2:
0000000000000001 CR3:
000000006a91c000 CR4:
00000000000006e0
DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
DR3:
0000000000000000 DR6:
00000000ffff0ff0 DR7:
0000000000000400
Process su (pid: 31245, threadinfo
ffff88006af3a000, task
ffff8800374414c0)
Stack:
0000000512e0958e 0000000000008000 ffff880037f8d180 0000000000000001
0000000000000000 0000000000008001 ffff88007d199000 ffffffff810f20ce
0000000000008000 ffff88006af3be48 0000000000000024 ffffffff810face3
Call Trace:
[<
ffffffff810f20ce>] ? get_empty_filp+0x70/0x12f
[<
ffffffff810face3>] ? do_filp_open+0x145/0x590
[<
ffffffff810ce208>] ? tlb_finish_mmu+0x2a/0x33
[<
ffffffff810ce43c>] ? unmap_region+0xd3/0xe2
[<
ffffffff810e4393>] ? virt_to_head_page+0x9/0x2d
[<
ffffffff81103916>] ? alloc_fd+0x69/0x10e
[<
ffffffff810ef4ed>] ? do_sys_open+0x56/0xfc
[<
ffffffff81008a02>] ? system_call_fastpath+0x16/0x1b
Code: 0f 1f 44 00 00 49 89 c6 fa 66 0f 1f 44 00 00 65 4c 8b 04 25 60 e8 00 00 48 8b 45 00 49 01 c0 49 8b 18 48 85 db 74 0d 48 63 45 18 <48> 8b 04 03 49 89 00 eb 14 4c 89 f9 83 ca ff 44 89 e6 48 89 ef
RIP [<
ffffffff810e61a3>] kmem_cache_alloc+0x5b/0xe9
This problem is that find_keyring_by_name does not confirm that the keyring is
valid before accepting it.
Skipping keyrings that have been reduced to a zero count seems the way to go.
To this end, use atomic_inc_not_zero() to increment the usage count and skip
the candidate keyring if that returns false.
The following script _may_ cause the bug to happen, but there's no guarantee
as the window of opportunity is small:
#!/bin/sh
LOOP=100000
USER=dummy_user
/bin/su -c "exit;" $USER || { /usr/sbin/adduser -m $USER; add=1; }
for ((i=0; i<LOOP; i++))
do
/bin/su -c "echo '$i' > /dev/null" $USER
done
(( add == 1 )) && /usr/sbin/userdel -r $USER
exit
Note that the nominated user must not be in use.
An alternative way of testing this may be:
for ((i=0; i<100000; i++))
do
keyctl session foo /bin/true || break
done >&/dev/null
as that uses a keyring named "foo" rather than relying on the user and
user-session named keyrings.
Reported-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Arnaldo Carvalho de Melo [Tue, 4 May 2010 23:58:51 +0000 (20:58 -0300)]
perf report: Make dso__calc_col_width agree with hist_entry__dso_snprintf
The first was always using the ->long_name, while the later used
->short_name if verbose was not set, resulting in the dso column to be
much wider than needed most of the time.
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Takashi Iwai [Wed, 5 May 2010 08:08:30 +0000 (10:08 +0200)]
Merge branch 'fix/hda' into for-linus
Daniel T Chen [Wed, 28 Apr 2010 22:00:11 +0000 (18:00 -0400)]
ALSA: hda: Fix 0 dB for Packard Bell models using Conexant CX20549 (Venice)
BugLink: https://launchpad.net/bugs/541802
The OR's hardware distorts at PCM 100% because it does not correspond to
0 dB. Fix this in patch_cxt5045() for all Packard Bell models.
Reported-by: Valombre
Cc: <stable@kernel.org>
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Anisse Astier [Wed, 28 Apr 2010 16:05:06 +0000 (18:05 +0200)]
ALSA: hda - Add quirk for Dell Inspiron 19T using a Conexant CX20582
Add a quirk for all-in-one computer Dell Inspiron One 19 Touch to have proper
HP and Mic support.
Signed-off-by: Anisse Astier <anisse@astier.eu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Dan Carpenter [Wed, 28 Apr 2010 08:29:14 +0000 (10:29 +0200)]
ALSA: take tu->qlock with irqs disabled
We should disable irqs when we take the tu->qlock because it is used in
the irq handler. The only place that doesn't is
snd_timer_user_ccallback(). Most of the time snd_timer_user_ccallback()
is called with interrupts disabled but the the first ti->ccallback()
call in snd_timer_notify1() has interrupts enabled.
This was caught by lockdep which generates the following message:
> =================================
> [ INFO: inconsistent lock state ]
> 2.6.34-rc5 #5
> ---------------------------------
> inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
> dolphin/4003 [HC1[1]:SC0[0]:HE0:SE1] takes:
> (&(&tu->qlock)->rlock){?.+...}, at: [<
f84ec472>] snd_timer_user_tinterrupt+0x28/0x132 [snd_timer]
> {HARDIRQ-ON-W} state was registered at:
> [<
c1048de9>] __lock_acquire+0x654/0x1482
> [<
c1049c73>] lock_acquire+0x5c/0x73
> [<
c125ac3e>] _raw_spin_lock+0x25/0x34
> [<
f84ec370>] snd_timer_user_ccallback+0x55/0x95 [snd_timer]
> [<
f84ecc4b>] snd_timer_notify1+0x53/0xca [snd_timer]
Reported-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Mattias Walström [Wed, 5 May 2010 07:55:48 +0000 (00:55 -0700)]
FEC: Fix kernel panic in fec_set_mac_address.
Fix memory corruption that sometimes result in kernel panic.
Signed-off-by: Mattias Walström <mattias@vmlinux.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel T Chen [Wed, 5 May 2010 02:07:58 +0000 (22:07 -0400)]
ALSA: hda: Use olpc-xo-1_5 quirk for Toshiba Satellite P500-PSPGSC-01800T
BugLink: https://launchpad.net/bugs/549267
The OR verified that using the olpc-xo-1_5 model quirk allows the
headphones to be audible when inserted into the jack. Capture was
also verified to work correctly.
Reported-by: Richard Gagne
Tested-by: Richard Gagne
Cc: <stable@kernel.org>
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Daniel T Chen [Tue, 4 May 2010 00:39:31 +0000 (20:39 -0400)]
ALSA: hda: Use olpc-xo-1_5 quirk for Toshiba Satellite Pro T130-15F
BugLink: https://launchpad.net/bugs/573284
The OR verified that using the olpc-xo-1_5 model quirk allows the
headphones to be audible when inserted into the jack. Capture was
also verified to work correctly.
Reported-by: Andy Couldrake <acouldrake@googlemail.com>
Tested-by: Andy Couldrake <acouldrake@googlemail.com>
Cc: <stable@kernel.org>
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Brian J. Tarricone [Mon, 3 May 2010 00:32:10 +0000 (17:32 -0700)]
ALSA: hda - fix array indexing while creating inputs for Cirrus codecs
This fixes a problem where cards show up as only having a single mixer
element, suppressing all sound output.
Signed-off-by: Brian J. Tarricone <brian@tarricone.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Linus Torvalds [Wed, 5 May 2010 02:08:12 +0000 (19:08 -0700)]
Merge branch 'drm-linus' of git://git./linux/kernel/git/airlied/drm-2.6
* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/radeon/kms/legacy: only enable load detection property on DVI-I
drm/radeon/kms: fix panel scaling adjusted mode setup
drivers/gpu/drm/drm_sysfs.c: sysfs files error handling
drivers/gpu/drm/radeon/radeon_atombios.c: range check issues
gpu: vga_switcheroo, fix lock imbalance
drivers/gpu/drm/drm_memory.c: fix check for end of loop
drivers/gpu/drm/via/via_video.c: fix off by one issue
drm/radeon/kms/agp The wrong AGP chipset can cause a NULL pointer dereference
drm/radeon/kms: r300 fix CS checker to allow zbuffer-only fastfill
Linus Torvalds [Wed, 5 May 2010 02:07:35 +0000 (19:07 -0700)]
Merge branch 'x86-fixes-for-linus' of git://git./linux/kernel/git/x86/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip:
powernow-k8: Fix frequency reporting
x86: Fix parse_reservetop() build failure on certain configs
x86: Fix NULL pointer access in irq_force_complete_move() for Xen guests
x86: Fix 'reservetop=' functionality
Linus Torvalds [Wed, 5 May 2010 01:49:34 +0000 (18:49 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
KEYS: Fix RCU handling in key_gc_keyring()
KEYS: Fix an RCU warning in the reading of user keys
David Howells [Tue, 4 May 2010 13:16:10 +0000 (14:16 +0100)]
KEYS: Fix RCU handling in key_gc_keyring()
key_gc_keyring() needs to either hold the RCU read lock or hold the keyring
semaphore if it's going to scan the keyring's list. Given that it only needs
to read the key list, and it's doing so under a spinlock, the RCU read lock is
the thing to use.
Furthermore, the RCU check added in
e7b0a61b7929632d36cf052d9e2820ef0a9c1bfe is
incorrect as holding the spinlock on key_serial_lock is not grounds for
assuming a keyring's pointer list can be read safely. Instead, a simple
rcu_dereference() inside of the previously mentioned RCU read lock is what we
want.
Reported-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
David Howells [Fri, 30 Apr 2010 13:32:08 +0000 (14:32 +0100)]
KEYS: Fix an RCU warning in the reading of user keys
Fix an RCU warning in the reading of user keys:
===================================================
[ INFO: suspicious rcu_dereference_check() usage. ]
---------------------------------------------------
security/keys/user_defined.c:202 invoked rcu_dereference_check() without protection!
other info that might help us debug this:
rcu_scheduler_active = 1, debug_locks = 0
1 lock held by keyctl/3637:
#0: (&key->sem){+++++.}, at: [<
ffffffff811a80ae>] keyctl_read_key+0x9c/0xcf
stack backtrace:
Pid: 3637, comm: keyctl Not tainted 2.6.34-rc5-cachefs #18
Call Trace:
[<
ffffffff81051f6c>] lockdep_rcu_dereference+0xaa/0xb2
[<
ffffffff811aa55f>] user_read+0x47/0x91
[<
ffffffff811a80be>] keyctl_read_key+0xac/0xcf
[<
ffffffff811a8a06>] sys_keyctl+0x75/0xb7
[<
ffffffff81001eeb>] system_call_fastpath+0x16/0x1b
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Alex Deucher [Fri, 30 Apr 2010 16:37:31 +0000 (12:37 -0400)]
drm/radeon/kms/legacy: only enable load detection property on DVI-I
DVI-D doesn't have analog. This matches the avivo behavior.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Alex Deucher [Fri, 30 Apr 2010 16:00:44 +0000 (12:00 -0400)]
drm/radeon/kms: fix panel scaling adjusted mode setup
This should duplicate exactly what the ddx does for both
legacy and avivo.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Linus Torvalds [Tue, 4 May 2010 23:33:18 +0000 (16:33 -0700)]
Merge branch 'fixes' of git://git./linux/kernel/git/jlbec/ocfs2
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2:
ocfs2: Avoid a gcc warning in ocfs2_wipe_inode().
ocfs2: Avoid direct write if we fall back to buffered I/O
ocfs2_dlmfs: Fix math error when reading LVB.
ocfs2: Update VFS inode's id info after reflink.
ocfs2: potential ERR_PTR dereference on error paths
ocfs2: Add directory entry later in ocfs2_symlink() and ocfs2_mknod()
ocfs2: use OCFS2_INODE_SKIP_ORPHAN_DIR in ocfs2_mknod error path
ocfs2: use OCFS2_INODE_SKIP_ORPHAN_DIR in ocfs2_symlink error path
ocfs2: add OCFS2_INODE_SKIP_ORPHAN_DIR flag and honor it in the inode wipe code
ocfs2: Reset status if we want to restart file extension.
ocfs2: Compute metaecc for superblocks during online resize.
ocfs2: Check the owner of a lockres inside the spinlock
ocfs2: one more warning fix in ocfs2_file_aio_write(), v2
ocfs2_dlmfs: User DLM_* when decoding file open flags.
David Howells [Tue, 4 May 2010 12:42:53 +0000 (13:42 +0100)]
Fix the x86_64 implementation of call_rwsem_wait()
The x86_64 call_rwsem_wait() treats the active state counter part of the
R/W semaphore state as being 16-bit when it's actually 32-bit (it's half
of the 64-bit state). It should do "decl %edx" not "decw %dx".
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Tue, 4 May 2010 22:20:37 +0000 (15:20 -0700)]
Merge branch 'i2c-for-linus' of git://git./linux/kernel/git/jdelvare/staging
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
i2c-core: Use per-adapter userspace device lists
i2c: Fix probing of FSC hardware monitoring chips
i2c-core: Erase pointer to clientdata on removal
Linus Torvalds [Tue, 4 May 2010 22:16:15 +0000 (15:16 -0700)]
Merge branch 'perf-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf: Fix resource leak in failure path of perf_event_open()
Linus Torvalds [Tue, 4 May 2010 22:15:43 +0000 (15:15 -0700)]
Merge branch 'core-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
rcu: Fix RCU lockdep splat on freezer_fork path
rcu: Fix RCU lockdep splat in set_task_cpu on fork path
mutex: Don't spin when the owner CPU is offline or other weird cases
Ingo Molnar [Tue, 4 May 2010 16:31:47 +0000 (18:31 +0200)]
Merge branch 'perf' of git://git./linux/kernel/git/acme/linux-2.6 into perf/core
Anton Blanchard [Tue, 4 May 2010 11:19:15 +0000 (21:19 +1000)]
perf: Fix performance issue with perf report
On a large machine we spend a lot of time in perf_header__find_attr when
running perf report.
If we are parsing a file without PERF_SAMPLE_ID then for each sample we call
perf_header__find_attr and loop through all counter IDs, never finding a match.
As the machine gets larger there are more per cpu counters and we spend an
awful lot of time in there.
The patch below initialises each sample id to -1ULL and checks for this in
perf_header__find_attr. We may need to do something more intelligent eventually
(eg a hash lookup from counter id to attr) but this at least fixes the most
common usage of perf report.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Eric B Munson <ebmunson@us.ibm.com>
Acked-by: Eric B Munson <ebmunson@us.ibm.com>
LKML-Reference: <
20100504111915.GB14636@kryten>
Signed-off-by: Anton Blanchard <anton@samba.org>
--
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Tue, 4 May 2010 13:48:22 +0000 (10:48 -0300)]
perf inject: Add missing bits
New commands need to have Documentation and be added to command-list.txt
so that they can appear when 'perf' is called withouth any subcommand:
[root@doppio linux-2.6-tip]# perf
usage: perf [--version] [--help] COMMAND [ARGS]
The most commonly used perf commands are:
annotate Read perf.data (created by perf record) and display annotated code
archive Create archive with object files with build-ids found in perf.data file
bench General framework for benchmark suites
buildid-cache Manage build-id cache.
buildid-list List the buildids in a perf.data file
diff Read two perf.data files and display the differential profile
inject Filter to augment the events stream with additional information
kmem Tool to trace/measure kernel memory(slab) properties
kvm Tool to trace/measure kvm guest os
list List all symbolic event types
lock Analyze lock events
probe Define new dynamic tracepoints
record Run a command and record its profile into perf.data
report Read perf.data (created by perf record) and display the profile
sched Tool to trace/measure scheduler properties (latencies)
stat Run a command and gather performance counter statistics
test Runs sanity tests.
timechart Tool to visualize total system behavior during a workload
top System profiling tool.
trace Read perf.data (created by perf record) and display trace output
See 'perf help COMMAND' for more information on a specific command.
[root@doppio linux-2.6-tip]#
The new 'perf inject' command hadn't so it wasn't appearing on that list.
Also fix the long option, that should have no spaces in it, rename the faulty one
to be '--build-ids', instead of '--inject build-ids'.
Reported-by: Ingo Molnar <mingo@elte.hu>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jean Delvare [Tue, 4 May 2010 09:09:28 +0000 (11:09 +0200)]
i2c-core: Use per-adapter userspace device lists
Using a single list for all userspace devices leads to a dead lock
on multiplexed buses in some circumstances (mux chip instantiated
from userspace). This is solved by using a separate list for each
bus segment.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Michael Lawnick <ml.lawnick@gmx.de>
Jean Delvare [Tue, 4 May 2010 09:09:28 +0000 (11:09 +0200)]
i2c: Fix probing of FSC hardware monitoring chips
Some FSC hardware monitoring chips (Syleus at least) doesn't like
quick writes we typically use to probe for I2C chips. Use a regular
byte read instead for the address they live at (0x73). These are the
only known chips living at this address on PC systems.
For clarity, this fix should not be needed for kernels 2.6.30 and
later, as we started instantiating the hwmon devices explicitly based
on DMI data. Still, this fix is valuable in the following two cases:
* Support for recent FSC chips on older kernels. The DMI-based device
instantiation is more difficult to backport than the device support
itself.
* Case where the DMI-based device instantiation fails, whatever the
reason. We fall back to probing in that case, so it should work.
This fixes kernel bug #15634:
https://bugzilla.kernel.org/show_bug.cgi?id=15634
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Cc: stable@kernel.org
Wolfram Sang [Tue, 4 May 2010 09:09:27 +0000 (11:09 +0200)]
i2c-core: Erase pointer to clientdata on removal
After discovering that a lot of i2c-drivers leave the pointer to their
clientdata dangling, it was decided to let the core handle this issue.
It is assumed that the core may access the private data after remove()
as there are no guarantees for the lifetime of such pointers anyhow (see
thread starting at http://lkml.org/lkml/2010/3/21/68)
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Christoph Fritz [Sun, 25 Apr 2010 04:41:05 +0000 (21:41 -0700)]
Input: joydev - allow binding to button-only devices
Dance pads don't have an axis, so allow this kind of controllers
to be used via legacy joystick interface.
Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
David S. Miller [Tue, 4 May 2010 06:42:27 +0000 (23:42 -0700)]
ipv6: Fix default multicast hops setting.
As per RFC 3493 the default multicast hops setting
for a socket should be "1" just like ipv4.
Ironically we have a IPV6_DEFAULT_MCASTHOPS macro
it just wasn't being used.
Reported-by: Elliot Hughes <enh@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Frederic Weisbecker [Mon, 3 May 2010 13:39:45 +0000 (15:39 +0200)]
hw_breakpoints: Fix percpu build failure
Fix this build error:
kernel/hw_breakpoint.c:58:1: error: pasting "__pcpu_scope_" and "*" does not give a valid preprocessing token
It happens if CONFIG_DEBUG_FORCE_WEAK_PER_CPU, because we concatenate
someting with the name and we have the "*" in the name.
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Jason Wessel <jason.wessel@windriver.com>
LKML-Reference: <
20100503133942.GA5497@nowhere>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Florian Ragwitz [Tue, 4 May 2010 06:29:37 +0000 (23:29 -0700)]
Input: elantech - ignore high bits in the position coordinates
In older versions of the elantech hardware/firmware those bits always
were unset, so it didn't actually matter, but newer versions seem to
use those high bits for something else, screwing up the coordinates
we report to the input layer for those devices.
Signed-off-by: Florian Ragwitz <rafl@debian.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Florian Ragwitz [Tue, 27 Apr 2010 07:47:04 +0000 (00:47 -0700)]
Input: elantech - allow forcing Elantech protocol
Apparently hardware vendors now ship elantech touchpads with different version
magic. This options allows for them to be tested easier with the current driver
in order to add their magic to the whitelist later.
Signed-off-by: Florian Ragwitz <rafl@debian.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Florian Ragwitz [Tue, 27 Apr 2010 07:45:10 +0000 (00:45 -0700)]
Input: elantech - fix firmware version check
The check determining whether device should use 4- or 6-byte packets
was trying to compare firmware with 2.48, but was failing on majors
greater than 2. The new check ensures that versions like 4.1 are
checked properly.
Signed-off-by: Florian Ragwitz <rafl@debian.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Jarod Wilson [Tue, 4 May 2010 06:30:32 +0000 (23:30 -0700)]
Input: ati_remote - add some missing devices from lirc_atiusb
The (out-of-tree) lirc_atiusb driver has a much longer list of devices
it supports. Some of them look like they may just be guesses at possible
device IDs, but a few are definitely confirmed devices. This adds the
nVidia-branded RF receiver and the X10 Lola Wireless Video Sender device
(which contains an RF receiver) to the list of devices in ati_remote.
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
David S. Miller [Tue, 4 May 2010 06:21:27 +0000 (23:21 -0700)]
net: ep93xx_eth stops receiving packets
Receiving small packet(s) in a fast pace leads to not receiving any
packets at all after some time.
After ethernet packet(s) arrived the receive descriptor is incremented
by the number of frames processed. If another packet arrives while
processing, this is processed in another call of ep93xx_rx. This
second call leads that too many receive descriptors getting released.
This fix increments, even in these case, the right number of processed
receive descriptors.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Joel Becker [Tue, 4 May 2010 02:15:49 +0000 (19:15 -0700)]
ocfs2: Avoid a gcc warning in ocfs2_wipe_inode().
gcc warns that a variable is uninitialized. It's actually handled, but
an early return fools gcc. Let's just initialize the variable to a
garbage value that will crash if the usage is ever broken.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Linus Torvalds [Mon, 3 May 2010 23:36:19 +0000 (16:36 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
ceph: remove bad auth_x kmem_cache
ceph: fix lockless caps check
ceph: clear dir complete, invalidate dentry on replayed rename
ceph: fix direct io truncate offset
ceph: discard incoming messages with bad seq #
ceph: fix seq counting for skipped messages
ceph: add missing #includes
ceph: fix leaked spinlock during mds reconnect
ceph: print more useful version info on module load
ceph: fix snap realm splits
ceph: clear dir complete on d_move
David J. Choi [Thu, 29 Apr 2010 06:12:41 +0000 (06:12 +0000)]
drivers/net/phy: micrel phy driver
This is the first version of phy driver from Micrel Inc.
Signed-off-by: David J. Choi <david.choi@micrel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Peter Korsgaard [Mon, 3 May 2010 10:01:26 +0000 (10:01 +0000)]
dm9601: fix phy/eeprom write routine
Use correct bit positions in DM_SHARED_CTRL register for writes.
Michael Planes recently encountered a 'KY-RS9600 USB-LAN converter', which
came with a driver CD containing a Linux driver. This driver turns out to
be a copy of dm9601.c with symbols renamed and my copyright stripped.
That aside, it did contain 1 functional change in dm_write_shared_word(),
and after checking the datasheet the original value was indeed wrong
(read versus write bits).
On Michaels HW, this change bumps receive speed from ~30KB/s to ~900KB/s.
On other devices the difference is less spectacular, but still significant
(~30%).
Reported-by: Michael Planes <michael.planes@free.fr>
CC: stable@kernel.org
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Simon Arlott [Mon, 3 May 2010 10:20:27 +0000 (10:20 +0000)]
ppp_generic: handle non-linear skbs when passing them to pppd
Frequently when using PPPoE with an interface MTU greater than 1500,
the skb is likely to be non-linear. If the skb needs to be passed to
pppd then the skb data must be read correctly.
The previous commit fixes an issue with accidentally sending skbs
to pppd based on an invalid read of the protocol type. When that
error occurred pppd was reading invalid skb data too.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Simon Arlott [Mon, 3 May 2010 10:19:33 +0000 (10:19 +0000)]
ppp_generic: pull 2 bytes so that PPP_PROTO(skb) is valid
In ppp_input(), PPP_PROTO(skb) may refer to invalid data in the skb.
If this happens and (proto >= 0xc000 || proto == PPP_CCPFRAG) then
the packet is passed directly to pppd.
This occurs frequently when using PPPoE with an interface MTU
greater than 1500 because the skb is more likely to be non-linear.
The next 2 bytes need to be pulled in ppp_input(). The pull of 2
bytes in ppp_receive_frame() has been removed as it is no longer
required.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Sage Weil [Thu, 29 Apr 2010 20:26:53 +0000 (13:26 -0700)]
ceph: remove bad auth_x kmem_cache
It's useless, since our allocations are already a power of 2. And it was
allocated per-instance (not globally), which caused a name collision when
we tried to mount a second file system with auth_x enabled.
Signed-off-by: Sage Weil <sage@newdream.net>
Sage Weil [Fri, 23 Apr 2010 17:25:33 +0000 (10:25 -0700)]
ceph: fix lockless caps check
The __ variant requires caller to hold i_lock.
Signed-off-by: Sage Weil <sage@newdream.net>
Sage Weil [Wed, 28 Apr 2010 23:12:06 +0000 (16:12 -0700)]
ceph: clear dir complete, invalidate dentry on replayed rename
If a rename operation is resent to the MDS following an MDS restart, the
client does not get a full reply (containing the resulting metadata) back.
In that case, a ceph_rename() needs to compensate by doing anything useful
that fill_inode() would have, like d_move().
It also needs to invalidate the dentry (to workaround the vfs_rename_dir()
bug) and clear the dir complete flag, just like fill_trace().
Signed-off-by: Sage Weil <sage@newdream.net>
Sage Weil [Thu, 22 Apr 2010 20:48:59 +0000 (13:48 -0700)]
ceph: fix direct io truncate offset
truncate_inode_pages_range wants the end offset to align with the last byte
in a page.
Signed-off-by: Sage Weil <sage@newdream.net>
Sage Weil [Thu, 22 Apr 2010 14:47:01 +0000 (07:47 -0700)]
ceph: discard incoming messages with bad seq #
We can get old message seq #'s after a tcp reconnect for stateful sessions
(i.e., the MDS). If we get a higher seq #, that is an error, and we
shouldn't see any bad seq #'s for stateless (mon, osd) connections.
Signed-off-by: Sage Weil <sage@newdream.net>
Sage Weil [Thu, 22 Apr 2010 03:45:59 +0000 (20:45 -0700)]
ceph: fix seq counting for skipped messages
Increment in_seq even when the message is skipped for some reason.
Signed-off-by: Sage Weil <sage@newdream.net>
Sage Weil [Tue, 20 Apr 2010 22:20:33 +0000 (15:20 -0700)]
ceph: add missing #includes
Signed-off-by: Sage Weil <sage@newdream.net>
Sage Weil [Tue, 20 Apr 2010 17:27:13 +0000 (10:27 -0700)]
ceph: fix leaked spinlock during mds reconnect
Signed-off-by: Sage Weil <sage@newdream.net>
Sage Weil [Mon, 19 Apr 2010 20:50:26 +0000 (13:50 -0700)]
ceph: print more useful version info on module load
Decouple the client version from the server side. Print relevant protocol
and map version info instead.
Signed-off-by: Sage Weil <sage@newdream.net>
Sage Weil [Mon, 19 Apr 2010 17:15:44 +0000 (10:15 -0700)]
ceph: fix snap realm splits
The snap realm split was checking i_snap_realm, not the list_head, to
determine if an inode belonged in the new realm. The check always failed,
which meant we always moved the inode, corrupting the old realm's list and
causing various crashes.
Also wait to release old realm reference to avoid possibility of use after
free.
Signed-off-by: Sage Weil <sage@newdream.net>
Sage Weil [Fri, 16 Apr 2010 19:56:11 +0000 (12:56 -0700)]
ceph: clear dir complete on d_move
d_move() reorders the d_subdirs list, breaking the readdir result caching.
Unless/until d_move preserves that ordering, clear CEPH_I_COMPLETE on
rename.
Signed-off-by: Sage Weil <sage@newdream.net>
Linus Torvalds [Mon, 3 May 2010 14:54:08 +0000 (07:54 -0700)]
Merge git://git./linux/kernel/git/wim/linux-2.6-watchdog
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
watchdog: ep93xx_wdt.c fix default timout value in MODULE_PARM_DESC string.
Ryusuke Konishi [Mon, 3 May 2010 12:00:48 +0000 (21:00 +0900)]
nilfs2: fix sync silent failure
As of
32a88aa1, __sync_filesystem() will return 0 if s_bdi is not set.
And nilfs does not set s_bdi anywhere. I noticed this problem by the
warning introduced by the recent commit
5129a469 ("Catch filesystem
lacking s_bdi").
WARNING: at fs/super.c:959 vfs_kern_mount+0xc5/0x14e()
Hardware name: PowerEdge 2850
Modules linked in: nilfs2 loop tpm_tis tpm tpm_bios video shpchp pci_hotplug output dcdbas
Pid: 3773, comm: mount.nilfs2 Not tainted 2.6.34-rc6-debug #38
Call Trace:
[<
c1028422>] warn_slowpath_common+0x60/0x90
[<
c102845f>] warn_slowpath_null+0xd/0x10
[<
c1095936>] vfs_kern_mount+0xc5/0x14e
[<
c1095a03>] do_kern_mount+0x32/0xbd
[<
c10a811e>] do_mount+0x671/0x6d0
[<
c1073794>] ? __get_free_pages+0x1f/0x21
[<
c10a684f>] ? copy_mount_options+0x2b/0xe2
[<
c107b634>] ? strndup_user+0x48/0x67
[<
c10a81de>] sys_mount+0x61/0x8f
[<
c100280c>] sysenter_do_call+0x12/0x32
This ensures to set s_bdi for nilfs and fixes the sync silent failure.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Tom Zanussi [Mon, 3 May 2010 05:14:48 +0000 (00:14 -0500)]
perf: record TRACE_INFO only if using tracepoints and SAMPLE_RAW
The current perf code implicitly assumes SAMPLE_RAW means tracepoints
are being used, but doesn't check for that. It happily records the
TRACE_INFO even if SAMPLE_RAW is used without tracepoints, but when the
perf data is read it won't go any further when it finds TRACE_INFO but
no tracepoints, and displays misleading errors.
This adds a check for both in perf-record, and won't record TRACE_INFO
unless both are true. This at least allows perf report -D to dump raw
events, and avoids triggering a misleading error condition in perf
trace. It doesn't actually enable the non-tracepoint raw events to be
displayed in perf trace, since perf trace currently only deals with
tracepoint events.
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <
1272865861.7932.16.camel@tropicana>
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Mark Langsdorf [Wed, 31 Mar 2010 19:56:45 +0000 (21:56 +0200)]
powernow-k8: Fix frequency reporting
With F10, model 10, all valid frequencies are in the ACPI _PST table.
Cc: <stable@kernel.org> # 33.x 32.x
Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
LKML-Reference: <
1270065406-1814-6-git-send-email-bp@amd64.org>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Reviewed-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Wim Van Sebroeck [Mon, 3 May 2010 08:58:56 +0000 (08:58 +0000)]
watchdog: ep93xx_wdt.c fix default timout value in MODULE_PARM_DESC string.
The WATCHDOG_TIMEOUT macro does not exist. The default timeout value is WDT_TIMEOUT.
Fix the MODULE_PARM_DESC so that the code can compile again.
reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Ingo Molnar [Mon, 3 May 2010 07:19:43 +0000 (09:19 +0200)]
x86: Fix parse_reservetop() build failure on certain configs
Commit
e67a807 ("x86: Fix 'reservetop=' functionality") added a
fixup_early_ioremap() call to parse_reservetop() and declared it
in io.h.
But asm/io.h was only included indirectly - and on some configs
not at all, causing a build failure on those configs.
Cc: Liang Li <liang.li@windriver.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Wang Chen <wangchen@cn.fujitsu.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <
1272621711-8683-1-git-send-email-liang.li@windriver.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Mon, 3 May 2010 06:29:35 +0000 (08:29 +0200)]
Merge branch 'perf/core' of git://git./linux/kernel/git/frederic/random-tracing into perf/core
Arnaldo Carvalho de Melo [Sun, 2 May 2010 22:46:36 +0000 (19:46 -0300)]
perf inject: Refactor read_buildid function
Into two functions, one that actually reads the build_id for the dso if
it wasn't already read, and another taht will inject the event if the
build_id is available.
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jan Engelhardt [Sun, 2 May 2010 20:42:39 +0000 (13:42 -0700)]
net: fix compile error due to double return type in SOCK_DEBUG
Fix this one:
include/net/sock.h: error: two or more data types in declaration specifiers
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Arnaldo Carvalho de Melo [Sun, 2 May 2010 16:37:24 +0000 (13:37 -0300)]
perf record: Don't exit in live mode when no tracepoints are enabled
With this I was able to actually test Tom Zanussi's two previous patches
in my usual perf testing ways, i.e. without any tracepoints activated.
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>